They return at night, infiltrating the territory the Turks have taken.他们悄悄穿越土耳其人占领的区域，在夜间返回。They have taught the Turks numerous inventions, artifices, and machines of war.他们把众多发明创造、巧妙装置和战争机器传授给了土耳其人。Fully one-quarter of the workers are Turks.至少有四分之一的工人是土耳其人。